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Reviewed by James from Seattle on Saturday, December 31, 2016

Great for a winter walk in the woods or winter fishing or pretty much anything in the winter. I used to dread being out on the river for 14 hours in the winter time, but with a couple of these and some felted wool mittens, it's now a joy. Also, walking in the woods with a shotgun in the winter has always been an exercise in numb hands, but if you keep one hand in a pocket with one of these, and switch off when your carrying hand gets too cold, you will last a lot longer in the woods without getting grumpy. Also, they are far less fiddly and smaller and lighter than the liquid fuel warmers.

Once upon a time ..... I do have golden locks but not that story today. An older version of this type of warmer was very hot to the touch. This edition is skin friendly and warm enough for hours outdoors standing in silence on a bridge in protest of a proposed mine that would pollute/kill fish& wild rice in my home state. My excessively long skinny oft frostbitten fingers were comfortable in 20* weather. Nice price too! If you are thinking of below zero F. temps I recommend 2 in each mitten. On the bridge they worked well in gloves.

Yes I have traveled with in the US without a problem, I cannot say about Canada but I see no reason not to bring them in either luggage. Good Luck

Answered on 5/14/2016 3:45:17 AM by Mountain Momma from Portland ME

I do not know. I never tried. You should call the airline directly. Or just give it a try.

Answered on 5/14/2016 5:10:32 AM by Jhr923 from NJ - New Jersey

Yes on all accounts. I travel with them all the time -- Alaska, Canada, Iceland, Russia, NZ, never any problem.These are actually made of pretty ordinary materials and don't pose any toxic hazard. Safe to dispose of them in trash too.

Not reusable. Package states:
"this product is designed for one time use"
I love these, though. They are essential for me,
in cold weather because I have "Raynaud's" syndrome,
meaning my fingers and toes can go numb and lose all
circulation.
These really are wonderful in your gloves or in your pocket:)

Answered on 5/16/2014 9:16:34 PM by Nature Girl from New Mexico

I haven't used them yet.

Answered on 5/16/2014 9:24:37 PM by Getting Boulder from Boulder

No, they only work once, but once hot they last for several hours.

Answered on 5/16/2014 10:49:38 PM by Nina from Minneapolis

No. They usually last up to 8 hours, one time use only. If they aren't producing heat in that time frame I take them out and shake em a little bit, mostly get some air to them, then they are warm again.

Answered on 5/16/2014 11:03:50 PM by Dora the Explorer from Tahoe

No, these cannot be reused. Once you open the package the grabbers heat up in like a minute or so, getting warmer until they reach max heat. The heat lasts for maybe 8 hours--it's a long time, because I'll just use one packet for a day of outside activity. The packets gradually lose heat and you cannot regenerate it. They're disposable. Once you take the grabber out of the packaging, the clock starts ticking. You can't stop it from heating up and you can't regenerate the heat once it starts to die. Hope this helps.

Answered on 5/16/2014 11:17:02 PM by Linda from Upstate NY

No, they are.not reusable. Once opened, you have about 6 hours of warmth from the packs .

Answered on 5/17/2014 4:32:27 AM by Skier in NY from New york

No, the chemical reaction that creates the warmth is a one time event

Answered on 5/17/2014 5:13:30 AM by The Wolf from New York

No, so buy a 10 pack, they last about 4-6 hours depending on how cold it is and what kind of gloves/mitts
you are wearing.

Answered on 5/17/2014 5:51:11 AM by Mountain Momma from Portland ME

No, not reusable. I can usually get a full day's warmth from them.

Answered on 5/17/2014 6:20:34 AM by Karen from Utah

No Vickie they are not. But they are cheap enough from STP plus if you happen to have a coupon these are a good deal.
I found them useful over the winter this year in NJ.

Answered on 5/17/2014 7:16:17 AM by liljerseygirl from New Jersey

No, they are a one time use only, but they last for hours

Answered on 5/17/2014 7:35:55 AM by maryb from Newburgh, NY

No, one time only product

Answered on 5/17/2014 9:21:27 AM by Eryan from New Jersey

They work well but are not reuseable.

Answered on 5/17/2014 7:18:44 PM by Margaret from Virginia

No......once you activate the packet by rubbing it, it will stay real warm for a few hours ....I don't think I ever needed it more than 4 hours and it did stay warm for that length of time. My Grandchildren love these packets.......I give them as "a stocking stuffer" for Xmas. I also use them when I go for long walks in the winter and hockey games. I keep a set in my car in case I need them.
Hope this helps.

Answered on 5/17/2014 9:16:48 PM by GrammyPA from PA

Sadly, they are not reusable. However, the good news is: I have reusable one's but they are to big to fit inside my gloves and they don't give-off enough heat to warm my hands from the outside in! These warmers are flexible enough to put inside gloves and they kept my hands and fingers warm.. Sierra's price makes them cost effective !

Answered on 5/18/2014 4:34:30 PM by Kairos from Pennsylvania

Once opened, the heat lasts for at least 7 hours, maybe more. So, you could use them in the morning & then again in the afternoon. But after about 7 hours, they no longer work & you cannot use them later.

Answered on 5/18/2014 9:27:50 PM by Lela from Michigan

No, the Grabber heat backs (whether hand warmer, toe warmer or foot warmer) are not reusable. They create heat through a chemical reaction in the product, and once that reaction is completed, the chemicals are consumed. However, for the price of the product, the fact that they are disposed off after use is not a major concern for at least most of us. I have been VERY happy to have had them on several occasions when I my hands (or feet, as the case may be) otherwise would have been very uncomfortably cold, such a skiing or fly fishing in temperatures in the teens or 20's. In such situations they are definitely worth the price. I would suggest that you add a half dozen of these to you next order (I don't know that I would suggest ordering just these) from STP and try them out - I will be surprised if you do not find they are well worth the price and find yourself order more (though I know STP does not have them available all of the time, they certainly do seem to have them on a regular basis).

Answered on 5/19/2014 7:34:26 AM by savagelawyer from New York City

Yes, if you seal them in a Ziploc bag. They are air-activated so after you open them they will continue to work (approx. 8-10hrs) unless you cut off the oxygen. By doing this, I've been able to get 2 or 3 days of use out of them. I googled this question and found a video on you-tube.

About Grabber

Grabber heat packs keep your comfort on the front burner with the full line of Grabber warmers that provide head-to-toe warmth and comfort. Grabber warmers are designed for economical, one-time use and come in a variety of shapes and sizes. Grabber hand, foot and toe warmers keep you warm from head to toe with designs including full-insole foot warmers, along with Grabber heat packs for hands and Grabber adhesive full-body warmers. All Grabber products are tested at independent laboratories to ensure excellent quality in each and every Grabber warmer and heat pack. Grabber warmers require no shaking or kneading; Grabber warmers require no batteries, and with non-combustible Grabbers, there is no fire hazard. Grabber instant heat comes naturally, with odorless, non-toxic heat that is air-activated – Grabber is the safe choice for staying warm! From the duck blind to the ski slopes and everywhere in between, choose Grabber warmers and heat packs to beat the bone-chilling cold.